EP2250686B1 - Système de dégazage destiné à un accumulateur et accumulateur doté d'un tel système de dégazage - Google Patents

Système de dégazage destiné à un accumulateur et accumulateur doté d'un tel système de dégazage Download PDF

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Publication number
EP2250686B1
EP2250686B1 EP09717289A EP09717289A EP2250686B1 EP 2250686 B1 EP2250686 B1 EP 2250686B1 EP 09717289 A EP09717289 A EP 09717289A EP 09717289 A EP09717289 A EP 09717289A EP 2250686 B1 EP2250686 B1 EP 2250686B1
Authority
EP
European Patent Office
Prior art keywords
accumulator
degassing system
degassing
flap
flaps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09717289A
Other languages
German (de)
English (en)
Other versions
EP2250686A1 (fr
Inventor
Martin Wiegmann
Ralf Joswig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clarios Technology and Recycling GmbH
Original Assignee
Johnson Controls Hybrid and Recycling GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Controls Hybrid and Recycling GmbH filed Critical Johnson Controls Hybrid and Recycling GmbH
Priority to PL09717289T priority Critical patent/PL2250686T3/pl
Publication of EP2250686A1 publication Critical patent/EP2250686A1/fr
Application granted granted Critical
Publication of EP2250686B1 publication Critical patent/EP2250686B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H01M50/333—Spring-loaded vent valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/34—Gastight accumulators
    • H01M10/345—Gastight metal hydride accumulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to a degassing system for an accumulator, in particular for hybrid accumulators, nickel-metal hydride accumulators and lithium-ion accumulators.
  • the invention further relates to an accumulator with a degassing system.
  • Powerful accumulators with high energy densities in the galvanic cells are used in particular in hybrid vehicles and in electric vehicles.
  • the inside of the batteries must be protected from dust and splash water, which is caused for example by high-pressure cleaner or steam jet.
  • a venting hose for an alkaline battery consisting of a neck and a hinged lid with a valve, which are hinged about a first axis. Also provided is a force acting on the hinged lid Torsion spring, which is attached to a second axis.
  • the battery chamber is located in a cabinet having a plurality of openings in a side wall of the chamber, which serve as a gas outlet opening.
  • a sealing plug for accumulator cells with a housing made of plastic, which is screwed or concentrated into the electrolyte introduction opening, and which has a microporous body for degassing the cell.
  • a pressure relief valve is arranged in the gas path in front of the microporous body.
  • the object of the present invention is therefore to provide a degassing system for an accumulator which offers effective protection against gas overpressure and against external contaminants. It is also an object of the present invention Invention to provide an accumulator housing and a rechargeable battery, which are effectively protected against gas overpressure and external contaminants.
  • the object is achieved by a degassing system with the features of claim 1, with a battery housing with the features of claim 5 and with an accumulator having the features of claim 7.
  • the degassing system of the present invention provides for rapid pressure equalization between the interior of the accumulator and the accumulator environment when a cell inside the accumulator housing releases a large amount of gas as a result of overcharging, short-circuiting or some other cause.
  • the large amount of gas released accumulates in the accumulator housing and generates an overpressure of the internal gas pressure relative to the ambient pressure (called gas overpressure for short).
  • gas overpressure for short.
  • the at least one rotatably mounted around the pin flap opens at a certain gas pressure and allows gas escape from the .Akkumulatorgephase.
  • the flap opens depending on the gas pressure.
  • the flap opens easily even at a very low gas pressure and is completely open at a predefined gas pressure, for example at a gas pressure of half a bar or a bar.
  • Another advantage of the degassing system according to the invention is that condensate, which accumulates on the bottom of the accumulator housing, can drain between the seal and the at least one flap.
  • the accumulator interior is safely protected by the degassing system according to the invention against external influences (for example spray water or dust).
  • This protection is achieved in that the at least one flap is arranged such that the flap is pressed by the spray water or the like against the seal and thus the gas outlet opening is effectively closed.
  • the protection of the accumulator interior and the at least one flap against external influences can be improved if below the at least one flap Baffle plate is arranged.
  • the baffle plate is arranged so that it is as well protected against direct impact by external influences, the at least one flap.
  • the baffle plate in a plane perpendicular to a longitudinal axis of the degassing system is at least as large as the dimensioned at least one flap and in the axial direction below the at least one flap.
  • exactly two symmetrically arranged around the pin flaps are provided.
  • the pen is then between the two flaps.
  • the two flaps and the spring (it can also be provided for each flap a spring) are arranged to each other that on the two flaps an opposite torque is applied. In this way it is ensured that they are in the installed state against a torque generated by the spring or the springs down to open and pressed up against the seal.
  • the degassing system has a substantially circular cross-section.
  • an annular seal in this case has advantages in sealing properties over angular seals.
  • other cross-sectional areas such as rectangular or square, are used.
  • an accumulator housing with a degassing system is also provided.
  • the degassing system is mounted on the housing bottom of the accumulator housing.
  • the accumulator housing according to the invention is particularly suitable for accumulators which are designed as hybrid accumulators, nickel-metal hydride accumulators or lithium-ion accumulators, in which high energy densities can occur.
  • an accumulator with an accumulator housing according to the invention is further provided.
  • the accumulator according to the invention comprises a plurality of cells which are accommodated in the accumulator housing.
  • the accumulator has all the components required for its intended use, e.g. a positive and a negative pole.
  • FIG. 1 shows a degassing system 1 according to the invention.
  • the degassing system 1 comprises a Korso 2. Under a Korso is understood a basic body in which are preferably also holes for attaching other components.
  • the Korso 2 has a cylindrical shape with a circular cross-sectional area.
  • the upper side 3 of the Korsos 2 has a circular edge 4 and is lowered centrally circular.
  • the circular depression 5 has a degassing opening 6.
  • the degassing opening 6 consists of two openings in the form of circular sections (each formed from a circular arc and a secant), which are arranged symmetrically to a diagonal of the reduction 5.
  • the Korso 2 has on its coat two diagonally opposite holes 7, of which, however, only one can be seen.
  • a pin 8 is mounted in the holes 7, a pin 8 is mounted.
  • the pin 8 has expediently a circular cylindrical shape.
  • the pin 8 is mounted in the Korso 2 such that it is arranged below a web 9 which lies between the two circular segment-shaped components of the degassing opening 6.
  • the degassing system further comprises a seal 10.
  • the seal 10 has with respect to a longitudinal axis 11 vertically oriented mounting portions 12.
  • the attachment portions 12 have L-shaped cross sections (perpendicular to the longitudinal axis 11).
  • the fastening portions 12 are shaped so that they can be inserted through the degassing 6 through and rest on the reduction 5 due to the L-shaped cross-sectional areas. In this way, the seal 10 in the vertical direction (ie in the direction of the longitudinal axis 11) has a tight fit.
  • the seal 10 has openings 13 which correspond to the degassing opening 6 so that a gas flow from the inside of a rechargeable battery to the outside is not hindered.
  • the openings 13 preferably have approximately the same shape and dimension as the degassing openings 6.
  • the flaps 14 have in Substantial semicircular cross-sectional areas.
  • the flaps 14 are interconnected along a diagonal so as to be pivotal about the diagonal 15 relative to each other.
  • the flaps are sectionally shaped like hollow cylinders, so that the pin 8 can be guided along the diagonal 15 through these hollow cylinders.
  • the hollow cylinder itself need not be completely closed on their lateral surfaces. It is crucial that the pin 8 is included so far that the flaps 14 are securely pivotable about the pin 8.
  • the spring 17 consists of a spirally wound suitable metal wire.
  • the ends 18 are extended.
  • baffle plate 19 is finally provided, which is arranged below the flaps 14.
  • the baffle 19 is fixed at a predefined distance from the underside of the Korsos 2.
  • the baffle plate is fastened with screws 20, which are guided by the baffle plate 19 and screwed into the Korso 2. The predefined distance is ensured by spacers 21.
  • the baffle plate 19 has two vertically upwardly directed wings 22.
  • the wings 22 are in the assembled state on the outside of the Korso 2 such that they cover the holes 7. As a result, the holes 7 are protected from the penetration of external influences.
  • FIG. 2 shows the degassing system 1 from FIG. 1 in side view and in assembled condition.
  • FIG. 3 the degassing system 1 is shown in perspective view from below (viewed from the outside).
  • FIG. 4 is easy to see how the L-shaped mounting portions 12 engage the top of the recess 5 and ensure a tight fit of the seal 10.
  • FIG. 5 shows a cross-sectional view of the assembled degassing system 1 in the direction of V.
  • FIG. 2
  • the flaps 14 are urged upwardly by the spring 17 and the ends 18 of the spring 17, respectively, so that they are oriented substantially horizontally, that is perpendicular to the longitudinal axis 11.
  • the movement of the flaps 14 upward is bounded by horizontally extending projections 24. It does not have to be a plurality of projections 24, it is also possible that the projection 24 runs in a circle around the longitudinal axis 11.
  • FIG. 6 shows the view FIG. 5 with released vent holes 6. This can be seen from the fact that the flaps 14 are folded substantially vertically downwards. This is possible because a higher gas pressure is present on the accumulator inner side 25 than in the accumulator environment 26.
  • the gas pressure is sufficiently large to fold the flaps 14 completely against the spring force down. In this position, a very fast pressure equalization is possible.
  • the gas overpressure for this state is about one bar.
  • the Stitt 8 can be aligned.
  • the adjusting screws 24 are paraxial and passed over or below the pin 8.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Claims (9)

  1. Système de dégazage pour un accumulateur, le système de dégazage (1) présentant :
    a) un corso (2) avec une ouverture de dégazage (6),
    b) une goupille (8) disposée dans le corso (2),
    c) au moins un clapet (14) monté de manière à pouvoir tourner autour de la goupille (8),
    d) un ressort (17) qui est disposé de manière à exercer un couple sur l'au moins un clapet (14),
    e) un joint d'étanchéité (10) qui est disposé de telle sorte que l'au moins un clapet (14) s'applique dans la position de repos contre le joint d'étanchéité (10) et ferme l'ouverture de dégazage.
  2. Système de dégazage selon la revendication 1, caractérisé par une tôle d'impact (19) qui est disposée sous l'au moins un clapet (14).
  3. Système de dégazage selon la revendication 1 ou 2, caractérisé en ce que deux clapets (14) disposés symétriquement autour de la goupille (8) sont prévus.
  4. Système de dégazage selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de dégazage (1) présente une section transversale essentiellement circulaire.
  5. Boîtier d'accumulateur comprenant un système de dégazage (1) selon l'une quelconque des revendications précédentes.
  6. Boîtier d'accumulateur selon la revendication 5, caractérisé en ce que le système de dégazage (1) est monté sur le fond de boîtier du boîtier d'accumulateur.
  7. Accumulateur comprenant un boîtier d'accumulateur selon la revendication 5 ou 6.
  8. Accumulateur selon la revendication 7, caractérisé par une pluralité de piles galvaniques, qui sont disposées dans le boîtier d'accumulateur.
  9. Accumulateur selon la revendication 8, caractérisé en ce que les piles galvaniques sont des piles ion-lithium ou des piles nickel-métal-hydrure.
EP09717289A 2008-03-07 2009-02-26 Système de dégazage destiné à un accumulateur et accumulateur doté d'un tel système de dégazage Not-in-force EP2250686B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09717289T PL2250686T3 (pl) 2008-03-07 2009-02-26 Układ odgazowania akumulatora i akumulator z układem odgazowania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008013186A DE102008013186B4 (de) 2008-03-07 2008-03-07 Entgasungssystem für einen Akkumulator, Akkumulatorgehäuse und Akkumulator mit einem Entgasungssystem
PCT/EP2009/001372 WO2009109324A1 (fr) 2008-03-07 2009-02-26 Système de dégazage destiné à un accumulateur et accumulateur doté d'un tel système de dégazage

Publications (2)

Publication Number Publication Date
EP2250686A1 EP2250686A1 (fr) 2010-11-17
EP2250686B1 true EP2250686B1 (fr) 2012-08-29

Family

ID=40756981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09717289A Not-in-force EP2250686B1 (fr) 2008-03-07 2009-02-26 Système de dégazage destiné à un accumulateur et accumulateur doté d'un tel système de dégazage

Country Status (7)

Country Link
US (1) US8062781B2 (fr)
EP (1) EP2250686B1 (fr)
CN (1) CN102007621B (fr)
DE (1) DE102008013186B4 (fr)
ES (1) ES2391005T3 (fr)
PL (1) PL2250686T3 (fr)
WO (1) WO2009109324A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101863091B1 (ko) 2011-11-24 2018-06-01 삼성에스디아이 주식회사 이차전지
DE102014200194A1 (de) 2014-01-09 2015-07-09 Robert Bosch Gmbh Batteriesystem mit wenigstens einer Batteriezelle und einer Entgasungseinrichtung
DE102023102381A1 (de) 2023-02-01 2024-08-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kfz-Hochvolt-Traktionsbatterie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480437A (en) * 1947-05-15 1949-08-30 Nickel Cadmium Battery Corp Filling and vent valve
SU393785A1 (ru) * 1972-01-28 1973-08-10 Вентиляционная пробка для щелочного аккумулятора
DE9104291U1 (de) * 1991-04-09 1991-07-04 Varta Batterie Ag, 3000 Hannover Verschlußstopfen
JPH06338344A (ja) * 1993-05-31 1994-12-06 Sanyo Electric Co Ltd 密閉形ニッケル・金属水素化物アルカリ蓄電池
JPH09181460A (ja) * 1995-12-25 1997-07-11 Hitachi Telecom Technol Ltd 屋外設置筐体の防水構造
US6586131B2 (en) * 2001-02-16 2003-07-01 Wilson Greatbatch Ltd. Apparatus for releasing gases from rechargeable lithium electrochemical cells during the formation stage of manufacturing

Also Published As

Publication number Publication date
EP2250686A1 (fr) 2010-11-17
ES2391005T3 (es) 2012-11-20
DE102008013186B4 (de) 2009-11-26
CN102007621B (zh) 2013-10-16
CN102007621A (zh) 2011-04-06
DE102008013186A1 (de) 2009-09-17
PL2250686T3 (pl) 2012-12-31
US8062781B2 (en) 2011-11-22
US20110052947A1 (en) 2011-03-03
WO2009109324A1 (fr) 2009-09-11

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